* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-form {
    background: white;
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.login-form h2 {
    margin-bottom: 30px;
    color: #333;
    font-size: 24px;
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: bold;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
}

.input-group button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 5px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s;
}

.input-group button:hover {
    transform: translateY(-2px);
}

.input-group button:active {
    transform: translateY(0);
}

.message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 5px;
    font-weight: bold;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
